摘要
针对高速重载工况下圆柱滚子轴承容易发生启动困难和滚子运行卡死现象,以新型滚滑轴承和圆柱滚子轴承为研究对象,考虑重载情况下材料的塑性变形,建立轴承的全柔性接触非线性有限元模型,仿真分析了两类轴承启动过程和稳态运转过程中内部动态应力的变化特点和规律。结果表明:高速重载工况下圆柱滚子轴承启动应力高,运行过程中容易出现滚子卡死现象,而滚滑轴承启动应力低,运行平稳,应力分布均匀,具有更好的动态性能;滚滑轴承内圈平均应力大于滚子轴承内圈平均应力;由于滚子与滑块的协同承载作用,使得滚滑轴承的滚子应力水平下降,提高了滚子的疲劳寿命。
For high-speed heavy-duty conditions,cylindrical roller bearings are prone to start-up difficulties and roller jamming.New rolling bearings and cylindrical roller bearings are the research objects.Considering the plastic deformation of materials under heavy load conditions,the bearing is established.The fully flexible contact nonlinear finite element model is used to simulate and analyze the characteristics and laws of internal dynamic stress changes during the starting process and steady state operation of the two types of bearings.The results show that the cylindrical roller bearing has high starting stress under high speed and heavy load conditions,and roller jamming is easy to occur during operation.The rolling bearing has low starting stress,stable operation,uniform stress distribution and better dynamic performance.The average stress of the inner ring of the rolling bearing is larger than the average stress of the inner ring of the roller bearing;due to the synergistic bearing effect of the roller and the slider,the roller stress level of the rolling bearing is lowered,and the fatigue life of the roller is improved.
作者
卢黎明
谷开
唐俊涛
李中豪
李夫
LU Li-ming;GU Kai;TANG Jun-tao;LI Zhong-hao;LI Fu(School of Mechatronic and Vehicle Engineering,East Jiaotong University,Nanchang 330013,China)
出处
《组合机床与自动化加工技术》
北大核心
2019年第7期26-29,33,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
江西省自然科学基金项目(2016BAB206155)
关键词
高速重载轴承
塑性变形
显式动力学
有限元
high speed and heavy-duty bearing
plastic deformation
explicit dynamic
finite element
作者简介
卢黎明(1963-),男,南昌人,华东交通大学教授,研究方向为机械动力学;通讯作者:谷开(1994-),男,湖北孝感人,华东交通大学硕士研究生,研究方向为轴承动力学,(E-mail)826724667@qq.com。
